Sergio McGuinness is a man who broke the land speed record on snow. He claims his father and grandfather died trying to break the record and his wife and children left him while he was working on his sleigh. Just as he was given a commemorative plaque, Milo, Zack, and Melissa inadvertently break his record. Just as he is about to have his plaque taken, Sergio jumps into his jet-propelled sleigh and flees with law enforcement hot on his tail.
His only appearance was in Love Toboggan.